Nut-lock.



J. B. WISMER.

' NUT LOOK APPLICATION FILED MAB. 3, 1910.

Patented Oct. 18,1910.

I kll WITNESSES ATTORNEYS JOSEPH IB. WISMER, OF FRANCONIA, PENNSYLVANIA.

NUT-LOCK.

Specification of Letters Eatent.

Patented Wit. 1%, 191L61 Application filed. March 3, 1910. Serial No. 547,016.

To all whom it may concern:

Be it known that I, JOSEPH B. WISMER, a

citizen of the United States, residing at Franconia, county of Mont omery, State of Pennsylvania, have invente' a new and useful Nut-Lock, of which the following is 'a specification.

My invention consists of a nut fastener or look embodying a nut provided with a detent, a sleeve adapted to force said detent into engagement with the threads of a bolt to be secured, and means for releasing said detent from said threads by the rotation of the nut or bolt when superior force is applied to either, the construction of parts being hereinafter described and the novel features pointed out in the claims.

For the purpose of explaining the invention, the accompanying drawing illustrates a satisfactory reduction, of the same to practice, but the important instrumentalities thereof may be varied, and so it is to be .understood that the invention is not limited to the specific arrangement and organization shown and described.

Figure 1 represents a perspective view of a nut lock embodying my invention. Fig. 2 represents a longitudinal section thereof. Figs. 3 and 4 represent sections on line w-w Fig. 2, ceitain portions being in different positlons in the two figures. Fig. 5 represents a perspective view of the detent employed.

Sim1lar letters of reference indicate corresponding parts in the figures.

Referring to the drawings :A. designates a nut which is formed with the reduced neck B- which extends in the longitudinal direction of'the body of the nut and projects from the outer side thereof. On said -r neck is freely fitted the sleeve C, a part of the wall of whose bore being elliptical producing a cam groove which 1s deepened at one end formin the cavity orrecess E and intermediate 0 its ends forming the cavity or recess F whose wall com rises a shoulder with which the head of tile detent may engage as will be? hereinafter more particularly referred to. In said neck is a radial passage G, in which is fitted the movable detent H, which consists of the tapering body J, the point K and the shoulders L at the lace of unction of said point with said y, it being noticed that said point which comprises the tooth proper of the detent is elongatedand when in position extends parallel with the bolt M .onwhioh' the nut A and its neck B are screwed.

The operation is as follows :-ln the normal condition of the device, the detent H has its head occupyin the recess E, and its front removed from t e thread of the bolt, the body of the detent remaining in such position owing to its frictional contact with the walls of the passage G. The nut A is screwed to the bolt, to the full or required extent, and the sleeve rotated in the present case to the right as per arrow 1 whereby the elliptical wall D of the same rides over the head of the detent H, and owing to the narrowing nature of the recess formed by said wall, the detent is moved in the passage G to and toward the bolt and its tooth K forced against the threads of the latter so as to crush or out into the same produc ing a depression N in said threads in the longitudinal direction of the bolt, while the head of the detent occupies the cavity F engaged by the shoulder thereof, the parts being in position as in Fig. 3, thus interlocking the bolt with the detent and consequently interlocking the nut and sleeve with reverse direction or that indicated by the arrow 2 when owing to the widening nature of the recess formed by the elliptical wall D, the head of the detent is gradually relieved of the pressure of said wall. Then the nut or bolt is rotated whereby as the threads of the latter contact with the shoulders L of the detent said shoulders are subjected to the action of the threads of the bolt, whereby the detent is lifted and the tooth K removed from the depression N, the head of the detent then entering the cavity E, while its tooth is no longer in the path of the threads of the bolt permitting the nut to be unscrewed from the bolt or viceversa. 0n the outer end of the neck B is the shoulder P which extends radially there- .from so as to embrace freely the outer side Having thus described my invention what I claim. as new and desire to secure by Letters Patent, is;--

1. In a nut lock, a nut having a neck portion, a sleeve rotatable thereon, and a detent in said neck portion, said sleeve having a bore with a cam groove which is provide with a recess at one end and an intermediate shoulder.

2. In a nut look, a nut having a neck portion, a sleeve rotatable thereon, and a detent in said neck portion, said sleeve having a bore with a cam groove which is provided with a recess at one end and an intermediate shoulder, said detent extending radially of the bore of the nut with its outer end constructed to engage either said recess or shoulder. v

3. In a nut look, a nut having a neck portion a sleeve rotatable thereon, and a radiall -extended detent in said neck portion, said detent being confined between the sleeve and nut both radially and lengthwise of the bore of the nut, said sleeve having a bore with an eniar ed portion with a shoulder to be engaged b the outer ends of said detent in radia inner end,

t. In a nut look, a nut, a detent therein alinement with its erases disposed radially of the nut, a rotatable 3o sleeve on a member of the nut, said sleeve havin a bore partly elliptical with an interme 'ate shoulder the elliptical portion being adapted to ride on said detent in one direction of rotation of the sleeve and force it endwise into engagement with a bolt on which saidnut is fitted and ride on said detent in. the other direction of rotation of extending shoulder to freely embrace the outer face of the sleeve, and a detent in said neck portion, said sleeve having a cam groove, which is provided with a recess at one end and an intermediate shoulder.

JOSEPH B. WISMER.

Witnesses: A

B. D. ALDERFER, MERMO D. WISMER. 

